Electric-wire insulator



(No Model.)

J. E. SHARPE.

ELECTRIC WIRE INSULATOR.

N0. 581,0 88. Patented Apr. 20, 1897.

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WITNE SES' a I IHVENI'OR: SEW flffi YQI'AT'IIORNEY ATENT @rrren.

JOHN E. SHARPE, OF ONEIDA, NEVJ YORK.

ELEQTRZlG-WinE SPECIFICATION foiming part of Letters Eat-eat No.581,088, dated April 20, 1897.

Application filed February 8, 1897. Serial llo. 622,482. (No model.)

To (ti/Y whom it may coir/sari Be it known that I, JOHN E. SHARPE, ofOneida, in the county of Madison, in the State of New York, haveinvented new and useful Improvements in Electricire Insulators, of whichthe following, taken in connection with the accompanying drawings, is afull, clear, and exact description.

This invention relates to the class of electric-wire insulators whichare employed for securing said wire to a pole or other suitable support.

The object of the invention is to provide an insulator which shall bemore readily, more securely, and more conveniently fastened to itssupport, and shall be as readily detached when required to be renewed,and shall also be capable of more securely holding the wire; and to thatend the invention consists, chiefly, of a block of non-conductingmaterial provided with parallel wire-receiving grooves re spectively inits top and bottom and with channels at opposite sides of and at rightangles to said grooves for the reception of fastening devices by whichto secure said block to its support; and the invention also consists ina novel construction of a supportingarm and its combination with theaforesaid insulator-block, all as hereinafter more fully described, andset forth in the claims.

In the annexed drawings, Figure l is a face view of an electric-wireinsulator embodying my invention. Figs. 2 and 3 are enlarged verticaltransverse sections respectively on lines X X and Y Y in Fig. 1 andshowing in one instance the wire attached. Fig. 4 is an enlargedlongitudinal horizontal section on line Z Z in Fig. 1. Fig. 5 is adetached perspective view of the supporting-arm and the tie-bar used inconnection therewith. Fig. 6 is a perspective view of theinsulator-block. Fig. 7 illustrates a modification of theinsulator-block secured to the supporting-arm, and Fig. 8 is a top planview of said block.

Similar letters of reference indicate corresponding parts.

a represents the supporting-arm of the insulators. Said arm is fastenedto a pole P or other suitable object by means of either spikes or screwsd a, passing through the holes a a in the central portion of the arm.This arm i prefer to form of a metal plate disposed vertically edgewiseand provided in its longitudinal edge, preferably in the top edge, withrecesses or notches Z) b for the reception of the insulator-blocks c 0.These blocks are composed of either glass or porcelain or other suitableand well-known non-conducting material and are provided with parallelgrooves b b respectively in their tops and bottoms for the reception ofthe electric wire f and the bii'1dingwire g.

he sides of the recesses Z) Z) are parallel, and the blocks 0 c areshaped correspondingly to fit closely within said recesses, into whichthey are inserted from the top thereof. The blocks are provided withflanges c c, which lap onto opposite sides of the arm a and therebyconline the blocks in the recesses b b, said flanges forming verticalgrooves, into which the vertical edges of the arm are closely fitted.These recesses are of sufficient depth to cause the top of the arm a toproject above the tops of the blocks 0 c and permit the attachment ofthe tie-bar (Z to the top of the arm. This tie-bar is provided withlongitudinal clownwardly-projectin g flanges d d, which embrace thesides ef the arm a and bear on the tops of the blocks c c, which arethus securely locked in the recesses l) l). The tiebar is detachablysecured to the arm by bolts 6 c, passing transversely through said partsand provided with nuts 6.

in case it becomes necessary to detach or remove the electric wire f orrenew the insulator-block c the bolts 6 c are readily removed and thetie-bar (Z either slipped endwise on the arm a or lifted from it, andthen the aforesaid block 0 can be lifted out of the recess 1 It isobvious that the replacing of the insulator-block c is equally asreadily accom' plished.

In the modification shown in Fig. 7 of the drawings the insulator-blockc is provided with channels or holes c' at opposite sides of and atright angles to the grooves Z) I). Said block is fastened to the arm aor other suitable support by either spikes or bolts passing through saidholes.

.iVhat I claim as my invention is 1. An electric-wire insulatorconsisting of a block of non-conducting material provided with parallelwire-receiving grooves respectively in its top and bottom, and withchannels at opposite sides of and at right angles to said grooves, forthe reception of fastening devices, by which to secure said block to itssupport.

2. An electric-Wire support consisting of a supporting-arm providct withrecesses in its longitudinal edge, insulator-blocks seated in saidrecesses and a tie-bar secured to said edge of the arm and extendingacross the insulator-blocks to confine them in their seats as set forth.

3. An electric-Wire support consisting of a supporting-arm formed of ametal plate sustained vertically edgewise and provided with recesses inits top, insulator-blocks seated in said recesses and provided withflanges lapping onto opposite sides of the aforesaid arm, and a tiebardetaehably secured to the top c securing said tie-bar to the platesubstantially as described and shown.

in testimony whereof I have hereuntosignedmynamethisSlthdayofJa11uary,1SfJT.

JOHX E. SHARPE. 111. sf]

Wi tnesses:

II. B. Flurru, ,I. J. Liniss.

